They are predators. Sakura's jade eyes narrow in precise concentration. Her heart beat slows to a quiet drumming; she does not let the adrenaline get the better of her. There is no excitement in her, only cold polished skill.
Sasuke watches her stance silently change, kunai shone bright in her dirty hands. Their prey is unaware, as they always are. He is a man who's existence has become a nuisance or a danger and therefore needs to disappear. It isn't their job to ask why. They do what they are told.
Her eyes flicker to Sasuke for a single moment, and it is the only queue he needs. He launches himself onto the forest floor below, before their prey. He notices Sasuke's Sharigan eyes and its already over. Sasuke twists into his mind with ease, the man thinks he is running away but his feet are firmly placed, his expression vacant. Sakura's kunai kisses his throat, and just like that, it is over.
Together they have erased this man, yet Sasuke can't help but feel as if he knows absolutely nothing about the pink haired woman before him. Gone is the love struck teenager he had known, gone are all her insecurities and worries. That delicate flower had finally blossomed to reveal a poison perfume and a row of savage teeth.
Later Sakura would soften up, a light returning to her eyes as easily as it had disappeared. She would recount their mission through a rose-colored filter to Naruto, smiling and joking, as if they had experienced completely different things. But Sasuke would not forget the savage stranger he had witnessed, how similar she looked to his older brother as he murdered their family. The way of the ninja was truly treacherous.